<template>
    <div class="top-category">
        <div class="container">
            <!-- 面包屑 -->
            <XtxBread>
                <XtxBreadItem to="/">首页</XtxBreadItem>
                <Transition name="fade-right" mode="out-in">
                    <XtxBreadItem :key="currentCategory.id">{{currentCategory.name}}</XtxBreadItem>
                </Transition>
            </XtxBread>
            <!-- 轮播图 -->
            <XtxCarousel :sliders="sliders" style="height:500px" />
            <!-- 所有二级分类 -->
            <div class="sub-list" v-if="currentCategory && currentCategory.children">
                <h3>全部分类</h3>
                <ul>
                    <li v-for="item in currentCategory.children" :key="item">
                        <a href="javascript:;">
                            <img :src="item.picture">
                            <p>{{item.name}}</p>
                        </a>
                    </li>
                </ul>
            </div>
            <!-- 不同分类商品 -->
            <div class="ref-goods" v-for="subItem in subList" :key="subItem.id">
                <div class="head">
                    <h3>- {{subItem.name}} -</h3>
                    <p class="tag">{{subItem.desc}}</p>
                    <XtxMore :path="`/category/sub/${subItem.id}`" />
                </div>
                <div class="body">
                    <GoodsItem v-for="goods in subItem.goods" :key="goods.id" :goods="goods" />
                </div>
            </div>
        </div>
    </div>
</template>
<script>
    import { computed, ref, watch } from '@vue/runtime-core'
    import { useStore } from 'vuex'
    import { useRoute } from 'vue-router'
    import GoodsItem from './components/GoodsItem.vue'
    import { getTopCategory } from '@/api/category'
    export default {
        name: 'currentCategory',
        components: {
            GoodsItem
        },
        setup() {
            const store = useStore()
            const sliders = computed(() => {
                return store.state.category.sliders
            })

            const route = useRoute()
            const currentCategory = computed(() => {
                return store.state.category.categoryList.find(fItem => fItem.id === route.params.id)
            })

            const subList = ref([])
            const getSubList = () => {
                getTopCategory(route.params.id).then(res => {
                    subList.value = res.result.children
                })
            }
            // 切换分类，由于路由规则没有改变，所有不会重新执行setup
            // 所有要监听路由参数的变化，重新请求数据
            watch(() => route.params.id, (newVal) => {
                if (newVal && `/category/${newVal}` === route.path) getSubList()
            }, { immediate: true })
            return {
                sliders,
                currentCategory,
                subList
            }
        }

    }
</script>
<style scoped lang="less">
    // .fade-right-enter-to,
    // .fade-right-leave-from {
    //     transform: none;
    //     opacity: 1;
    // }

    // .fade-right-enter-active,
    // .fade-right-leave-active {
    //     transition: all .5s;
    // }

    // .fade-right-enter-from,
    // .fade-right-leave-to {
    //     transform: translateX(20px);
    //     opacity: 0;
    // }

    .top-category {
        h3 {
            font-size: 28px;
            color: #666;
            font-weight: normal;
            text-align: center;
            line-height: 100px;
        }

        .sub-list {
            margin-top: 20px;
            background-color: #fff;

            ul {
                display: flex;
                padding: 0 32px;
                flex-wrap: wrap;

                li {
                    width: 168px;
                    height: 160px;

                    a {
                        text-align: center;
                        display: block;
                        font-size: 16px;

                        img {
                            width: 100px;
                            height: 100px;
                        }

                        p {
                            line-height: 40px;
                        }

                        &:hover {
                            color: @xtxColor;
                        }
                    }
                }
            }
        }

        .ref-goods {
            background-color: #fff;
            margin-top: 20px;
            position: relative;

            .head {
                .xtx-more {
                    position: absolute;
                    top: 20px;
                    right: 20px;
                }

                .tag {
                    text-align: center;
                    color: #999;
                    font-size: 20px;
                    position: relative;
                    top: -20px;
                }
            }

            .body {
                display: flex;
                justify-content: flex-start;
                flex-wrap: wrap;
                padding: 0 65px 30px;
            }
        }
    }
</style>